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How to Use ioutils for Reading, Writing and Copying Files in Java


How to Download and Use IOUtils in Java




If you are working with input/output operations in Java, such as reading from a file, writing to a network socket, copying data from one stream to another, or comparing the content of two streams, you may find yourself writing a lot of boilerplate code and handling exceptions. Wouldn't it be nice if there was a way to simplify these common tasks and make your code more concise and readable?


Well, there is a way. It's called IOUtils, and it's a class that provides utility methods for input/output operations. In this article, we will show you how to download and use IOUtils in your Java projects.




download ioutils


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What is IOUtils?




IOUtils is a class that provides utility methods for input/output operations




IOUtils is a class that belongs to the library, which is a collection of classes and utilities that deal with input/output functionality. IOUtils contains static methods that work on InputStream, OutputStream, Reader, and Writer objects. These methods can help you perform common tasks such as:


  • Closing a stream quietly, ignoring nulls and exceptions



  • Reading data from a stream into a byte array, a char array, or a String



  • Writing data from a byte array, a char array, or a String to a stream



  • Copying all the data from one stream to another



  • Comparing the content of two streams for equality



  • Converting between byte and char streams using different encodings



  • And more...



All the methods in IOUtils that read from a stream are buffered internally, which means that you don't need to use a BufferedInputStream or a BufferedReader. The default buffer size is 4K, but you can also specify your own buffer size if needed.


IOUtils is part of Apache Commons IO library




As mentioned before, IOUtils is part of the Apache Commons IO library, which is an open source project maintained by the Apache Software Foundation. The library contains many other useful classes and utilities for input/output operations, such as:


  • FileUtils, which provides methods for working with files and directories



  • FilenameUtils, which provides methods for manipulating filenames



  • FileSystemUtils, which provides methods for accessing file system information



  • LineIterator, which provides an iterator over the lines of a Reader



  • TeeInputStream and TeeOutputStream, which allow you to write data to multiple streams at once



  • BOMInputStream and BOMOutputStream, which handle byte order marks in Unicode streams



  • EndianUtils, which provides methods for converting between big-endian and little-endian byte orders



  • ClosedInputStream and ClosedOutputStream, which are dummy streams that are always closed



  • NullInputStream, NullOutputStream, NullReader, and NullWriter, which are dummy streams that do nothing



And more...


You can find the complete list of classes and utilities in the .


How to download ioutils using Apache Commons


Download ioutils for Java 8 or higher


Download file using java apache commons ioutils[^3^]


Verify the integrity of downloaded ioutils files


Download ioutils from Apache mirror site[^1^] [^2^]


Download ioutils source code or binaries


Download ioutils 2.13.0 latest version


Download ioutils PGP signature or SHA512 hash


Download ioutils KEYS file for Apache Commons developers


Download ioutils archives for older releases


Download ioutils examples and tutorials


Download ioutils documentation and javadocs


Download ioutils dependencies and libraries


Download ioutils maven or gradle dependency


Download ioutils jar file or zip file


Download ioutils alternative or similar tools


Download ioutils license and terms of use


Download ioutils bug fixes and updates


Download ioutils test cases and benchmarks


Download ioutils API reference and guides


How to use ioutils to copy, move, delete, or compare files


How to use ioutils to read, write, or append files


How to use ioutils to list, filter, or monitor files


How to use ioutils to convert, compress, or encrypt files


How to use ioutils to handle file streams, readers, writers, or channels


How to use ioutils to work with file names, paths, extensions, or sizes


How to use ioutils to check file existence, permissions, or attributes


How to use ioutils to create temporary files or directories


How to use ioutils to deal with file systems or file formats


How to use ioutils to improve file performance or reliability


How to install ioutils on Windows, Linux, or Mac OS


How to configure ioutils settings or options


How to troubleshoot ioutils errors or issues


How to uninstall ioutils from your system


How to update ioutils to the latest version


How to integrate ioutils with other Java frameworks or libraries


How to customize ioutils for your specific needs


How to extend ioutils functionality with plugins or extensions


How to contribute to ioutils development or community


How to report bugs or feedback for ioutils project


What are the benefits of using ioutils for file operations


What are the drawbacks of using ioutils for file operations


What are the best practices for using ioutils for file operations


What are the common mistakes for using ioutils for file operations


What are the new features or changes in ioutils 2.13.0 release


What are the differences between ioutils and other file utilities libraries


What are the requirements or prerequisites for using ioutils library


What are the supported platforms or environments for using ioutils library


What are the alternatives or competitors for using ioutils library


IOUtils can simplify common tasks such as reading, writing, copying, and comparing streams




To illustrate how IOUtils can simplify common tasks, let's look at some examples of using IOUtils methods. For each example, we will show the code without using IOUtils and the code with using IOUtils, and compare the difference.


How to Download IOUtils?




You need to add Apache Commons IO as a dependency to your project




In order to use IOUtils, you need to download and add Apache Commons IO as a dependency to your project. There are different ways to do this, depending on the build tool you are using. Here are some of the most common ways:


Using Maven




If you are using Maven as your build tool, you can add Apache Commons IO as a dependency in your pom.xml file. You need to specify the group ID, the artifact ID, and the version of the library. For example, to use the latest version (2.11.0) of Apache Commons IO, you can add the following dependency:


<dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.11.0</version> </dependency>


Maven will automatically download and add the library to your project classpath.


Using Gradle




If you are using Gradle as your build tool, you can add Apache Commons IO as a dependency in your build.gradle file. You need to specify the group ID, the name, and the version of the library. For example, to use the latest version (2.11.0) of Apache Commons IO, you can add the following dependency:


dependencies implementation 'commons-io:commons-io:2.11.0'


Gradle will automatically download and add the library to your project classpath.


Using Jar file




If you are not using any build tool, you can download the jar file of Apache Commons IO from the . You need to choose the version of the library that you want to use, and download the binary distribution file. For example, to use the latest version (2.11.0) of Apache Commons IO, you can download the file commons-io-2.11.0-bin.zip. Then, you need to unzip the file and copy the jar file commons-io-2.11.0.jar to your project classpath.


How to Use IOUtils?




You need to import org.apache.commons.io.IOUtils in your code




To use IOUtils in your code, you need to import the class org.apache.commons.io.IOUtils. You can use a single import statement or a wildcard import statement. For example:


// Single import statement import org.apache.commons.io.IOUtils; // Wildcard import statement import org.apache.commons.io.*;


After importing IOUtils, you can access its static methods by using the class name followed by a dot and the method name. For example:


// Using single import statement IOUtils.closeQuietly(inputStream); // Using wildcard import statement closeQuietly(inputStream);


You can use various methods of IOUtils for different purposes




As mentioned before, IOUtils provides many utility methods for input/output operations. You can use these methods for different purposes, depending on what you want to achieve. Here are some examples of using IOUtils methods:


Examples of using IOUtils methods




PurposeMethodDescriptionExample


Closing a stream quietlycloseQuietly(Closeable closeable)Closes a stream quietly, ignoring nulls and exceptions.// With


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